Description: Smart WiFi Door Sensor Door Open/Closed Detectors WiFi App Notification Alert Security Alarm Support Alexa Google Home.  Other Tuya Smart Home Devices: 1799248: Tuya WIFI PIR Human Motion Sensor;  1826075: Tuya Temperature Humidity Sensor;  1826096: Tuya ZB Smart Gateway;  1821083: Tuya Smart Plug;  1830494: Tuya Smart WIFI IR Remote Control;     Features: - APP Push: Push instant notification to your phone immediately when door/window is opened or closed. so you don't have to worry about your baby going out of house without notice, will easily know when your aged parents leave or arrive home and even can be clear when someone enters your home,shop,office ,etc.  - 24-hour Monitoring: Even you are far away from your home,garage and garden,etc, you can check whether the door/window is open or not with app anytime and anywhere.  - Loud Alarm: Loud alarm will be triggered when someone open or close your door or window, make you informed all the time. - Support Checking Open / Close Records in APP. Never worry about missing any important moment .If you install more than one door sensor in different places. All the statuses of doors and windows will be displayed simultaneously within the app ,so that you can easily know what you want at a glance.  - Low Battery Notification: When the battery level is low, it will automatically remind you to change battery, never worry about running out of battery.  - Device Sharing: Share the added door sensors with your family member, they also can monitor the status of your doors/windows when you are outside.     Specifications: Material: ABS;  Alarm Current: 70mA～120mA;  Wireless Type: 2.4GHz;  Wireless Standard: IEEE 802.11b/g/n;  Working Temperature: 0℃～40℃ (32℉ ～104℉ );  Working Humidity: 20%～85% RH;  Storage Temperature: 0℃～60℃ (32℉ ～140℉ );  Storage Humidity: 0%～90% RH;  Battery: LR03-1.5V/AAA*2 (Alkaline battery);  Battery Life: 6000 times trigger;  Standby Current: 8uA;  App: Tuya smart or Smart life;  Supports: Android 4.4 and iOS 8.0 or newer;  Size: (Main body): 71mm x 25mm x20 mm;  Size: (Small body): 36mm x 10mm x 17 mm;     Package Included:  1 x Wifi Door Sensor(no battery)